That's awesome. Got one in Tokyo to within 3.7 km. Been there though, so cheating really. Would've given me a massive score but on the next one I guessed Arizona and the location was actually in South Africa.

I just got around 15k on my first run. It's usually pretty easy to guess the continent - one of my pictures had a bloody American flag on it, and the other ones had vegetation or buildings that screamed "THIS IS SOMEWHERE IN AUSTRALIA" or somewhere else. But you can still be massively wrong, even with the right country.